What would be the cheapest but effective wideband out on the market right now?

 

I have a AEM, but its not the only good one.

 

check out inovate's wideband...they have a wide band for 200 bucks...i got one but i havent used it yet.
pretty good deal though...atleast i think so it comes with:
data logging software
wideband o2 sensor
the hardware to read the wideband

 

http://www.innovatemotorsports.com/

 

PLX M300 gets my vote.